Fig. 1

Schematic diagram of thermoelectric sensing system"

Fig. 2

Changes in band gap of double-layer GeTe under stress such as horizontal X-axis, vertical Y-axis, and interlayer spacing Z-axis"

Fig. 3

The electronic transport characteristic curve of double-layer GeTe thermoelectric sensor under external stress: (a) transverse tension or compression (X); (b) Longitudinal stretching or compression (Y); (c) Increase or decrease in vertical interlayer spacing (Z); (d) Lateral bending (θ)"

Fig. 4

The thermoelectric response characteristic curves of the double-layer GeTe thermoelectric sensor under different environmental temperature conditions：(a)—(c) witn X-axis lateral temperature difference of 5 K, 15 K, and 25 K, respectively; (d)—(f) with Y-axis longitudinal temperature difference of 5K, 15 K, and 25 K, respectively."

Fig. 5

The thermoelectric response characteristics of double-layer GeTe thermoelectric sensors under Z-axis stress under different temperature environmental conditions: (a)—(c) thermoelectric response characteristic curves along the X-axis at temperature differences of 5 K, 15 K, and 25 K, and (d)—(f) thermoelectric response characteristic curves along the Y-axis at temperature differences of 5 K, 15 K, and 25 K, respectively"

Fig. 6

The influence of lateral bending stress on the coaxial thermoelectric response characteristic curve of double-layer GeTe thermoelectric sensors under different environmental temperature conditions: (a)—(c) Transport curves when bending laterally along the X-axis with temperature differences of 5 K, 15 K, and 25 K, respectively; (d)—(f)Transport curves along the Y-axis when the temperature difference is 5 K, 15 K, and 25 K, respectively"

Fig. 7

(a)—(c) The amplification ratio of the thermoelectric response current of the sensor to different temperature differences under the same ambient temperature compared to ∆ T=10 K, (d)—(f) The thermoelectric response change ratio of the sensor under a 10 K temperature gradient"